CN108213295A - Ozzle forging method and nuclear power main pump pump case profiling forging technology - Google Patents
Ozzle forging method and nuclear power main pump pump case profiling forging technology Download PDFInfo
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- CN108213295A CN108213295A CN201711476079.5A CN201711476079A CN108213295A CN 108213295 A CN108213295 A CN 108213295A CN 201711476079 A CN201711476079 A CN 201711476079A CN 108213295 A CN108213295 A CN 108213295A
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- Prior art keywords
- ozzle
- forging
- punch
- cylinder blank
- guide post
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/04—Shaping in the rough solely by forging or pressing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
- B21J5/025—Closed die forging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/08—Upsetting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/10—Piercing billets
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The present invention relates to forging fields, disclose a kind of ozzle forging method and nuclear power main pump pump case profiling forging technology.The ozzle forging method, including forging the first ozzle, the first ozzle of forging includes：Location hole is processed on cylinder blank；Local heating is carried out to location hole；Cylinder blank is positioned in lower die, the guide post to match with location hole is provided in the jet-bedding of lower die, guide post positions cylinder blank across location hole；It is rushed in advance using the first punch in cylinder blank, it is corresponding with guide post on first punch to be provided with the first guide hole, guide post is inserted into the first guide hole, cavity inside cylinder blank is shaped, impact extrusion is carried out using the first punch in cylinder blank, the diameter of the second punch is less than the diameter of the first punch, it is corresponding with guide post on second punch to be provided with the second guide hole, during impact extrusion, guide post is inserted into the second guide hole, shapes the first ozzle.It can improve stock utilization, reduce processing capacity, and forging deformation extent is big, and forging quality is good, function admirable.
Description
Technical field
The present invention relates to forging field, especially a kind of ozzle forging method and nuclear power main pump pump case profiling forging technology.
Background technology
Main pump is unique active equipment in reactor pressure boundary, is the key that passive reactor main equipment.Main pump
Pump case is the core pressure-containing member of main pump, nuclear safety first device, belongs to the core equipment of nuclear island of nuclear power station, safety, can
There is significant impact by property, the advanced large-scale advanced pressurized water reactor nuclear power technology that there is intellectual property to China, it is desirable that according to the world
Nuclear power highest safety requirements, the manufacture of most stringent of technical standard.
The product of this kind of complexity of previous pump case is all manufactured using forging type, but will recently as Generation Ⅲ
The raising asked to further improve its safety and service life in nuclear power plant, improves the performance requirement of main pump pump case.For
Meet higher pump case performance requirement, casting pump case is replaced to have become a kind of necessary selection using forging pump case.Pump
Shell forging roughing figure is shown in Fig. 1, since pump case forging is complex-shaped, belongs to hollow shaped piece, two ozzle height are high, with forging
Ontology diameter difference is big, thus causes to forge difficulty increase, especially profiling is forged.
The main forging method of nuclear power main pump pump case forging is all using big envelope ozzle mode at present, forging method it is basic
Type has：
1. free forging hollow forging, forging structure chart is shown in Fig. 2 and Fig. 3, and forging ozzle is shaped using solid envelope, forging
Part weight is big, and stock utilization is low.
2. loose tooling forging shapes solid forging, forging structure chart is shown in Fig. 4 and Fig. 5, and ozzle is forged using solid envelope mode, forging
Part is solid construction, and forge weight is heavier, and stock utilization is low.
3. extrusion molding, forging structure is shown in Fig. 6, shapes 2 ozzles, 2 all realities of ozzle using punch extrusion billet
Core structure, stock utilization are low.
Therefore, based on forging stock utilization it is relatively low the shortcomings that, invented a kind of stock utilization it is higher profiling forging
Method, this method using special building mortion by 2 ozzles all forge come.
Invention content
The technical problems to be solved by the invention are to provide a kind of ozzle forging side that stock utilization can be greatly improved
Method and nuclear power main pump pump case profiling forging technology.
Ozzle forging method disclosed by the invention, including forging the first ozzle, the first ozzle of forging includes the following steps：
Location hole is processed on cylinder blank；
Local heating is carried out to location hole；
Cylinder blank is positioned in lower die, the guide post to match with location hole is provided in the jet-bedding of lower die, guide post is worn
Location hole is crossed to position cylinder blank；
It is rushed in advance using the first punch in cylinder blank, it is corresponding with guide post on the first punch to be provided with first and lead
Hole, when rushing in advance, guide post is inserted into the first guide hole, forming cylinder blank inside cavity；
Impact extrusion is carried out using the second punch in cylinder blank, the diameter of the second punch is less than the diameter of the first punch, the
Corresponding with guide post on two punches to be provided with the second guide hole, during impact extrusion, guide post is inserted into the second guide hole, shapes the first ozzle.
Preferably, the first punch and the second punch are put into cylinder blank respectively using special bearing and rushed
Pressure.
Preferably, the special bearing includes bottom end rail and bearing column, and bottom end rail and bearing column pass through detachable side
Formula connects, and bottom end rail is installed on movable crossrail of press and is moved up and down with it, and the first punch or the second punch are installed on bottom end rail
On moved up and down with it.
Preferably, the ozzle forging method, including forging the second ozzle, the second ozzle of forging includes the following steps：
The inclined-plane that gradient is α is processed on the outside of the end face of cylinder blank；
There is gradient α one end local heating to cylinder blank；
There is gradient α one end to be placed in the first drain cap, and make the one end with gradient α using upsetting plate jumping-up cylinder blank
Jumping-up closes up；
There is gradient α one end to be placed in the second drain cap being adapted with the second ozzle cylinder blank, be upset as using upsetting plate
The second ozzle of shape.
Preferably, after using second the second ozzle of drain cap upsetting formation, the upsetting to match is set inside cylinder blank
Thick cylinder carries out inner barrel extruding.
Preferably, the value range of α is 15 °~30 °.
The nuclear power main pump pump case profiling forging technology of the present invention, including ozzle forging method as described above.
The beneficial effects of the invention are as follows：
1. improving stock utilization, manufacture cost is reduced.The profiling forging using the present invention of nuclear power main pump pump case forging, pole
The big technique auxiliary material weight for reducing the forming technologies such as flat-die forging, forge weight reduce more than 40%, greatly reduce material cost.
2. reducing processing capacity, shorten the process-cycle.Profiling forging nuclear power pump case not only greatly reduces forge weight, Er Qieji
Mach workload is reduced greatly, reduces processing charges, shortens delivery date.
3. forging deformation extent is big, forging quality is good.Pump case forging profiling forging is shaped compared to open die forging mode, deforms journey
Spend bigger, more can forging, 2 ozzles are using large deformation jumping-up, extrusion molding, and forming effect is good, and forging quality is good.
4. forging performance is good.Pump case is forged using profiling, and forging contour shape is similar to roughing figure, forging material streamline
Completely, destruction of the machining to material streamline is reduced, forging performance is preferable.
Description of the drawings
Fig. 1 is nuclear power main pump pump case forging roughing figure；
Fig. 2 and Fig. 3 is flat-die forging pump case forging structure chart；
Fig. 4 and Fig. 5 is loose tool forging pump shell structure figure；
Fig. 6 is extrusion molding pump shell structure figure；
Fig. 7 is the pre- punching forming schematic diagram of the first ozzle forging；
Fig. 8 is the impact extrusion forming schematic diagram of the first ozzle forging；
Fig. 9 is the second ozzle forming conveyor front barrel blank structure schematic diagram；
Figure 10 is that the second ozzle shapes schematic diagram using the first drain cap；
Figure 11 is that the second ozzle shapes schematic diagram using the second drain cap；
Figure 12 is the forming schematic diagram that the second ozzle uses jumping-up cylinder.
Reference numeral：First ozzle 1, the second ozzle 2, lower die 3, jet-bedding 4, guide post 5, the first punch 6, the first guide hole 70,
Second guide hole 71, special bearing 8, bearing column 801, bottom end rail 802, cylinder blank 9, the second punch 10, the first drain cap 11,
Upsetting plate 12, the second drain cap 13, jumping-up cylinder 14.
Specific embodiment
The present invention is further described by taking nuclear power main pump pump case forging profiling forging as an example below.
Nuclear power main pump pump case forging profiling process for forging mainly comprises the following steps：
1. steel ingot bar hold, riser pressing tongs handle after Heating Steel Ingots, convenient for the clipping operation of next fire time upsetting pull process；
2. upsetting pull, blanking carry out blank jumping-up pulling base, improve ingot structure's defect；
3. jumping-up, punching are reaming base by blank jumping-up punching after blanking；
4. saddle forging, saddle forging to diameter meets intermediate base size, makes intermediate blank, intermediate blank is cylinder
Blank 9；
5. location hole is processed on cylinder blank 9, convenient for the hot lower rapid positioning impact extrusion position of blank, while location hole
Across the guide post 5 of lower die 3, ensure that punch impact extrusion process is steady；
6. heating location hole near zone after machining location hole by the way of local heating, cylinder blank 9 is put
It is placed in lower die 3, the guide post 5 to match with location hole is provided in the jet-bedding 4 of lower die 3, guide post 5 passes through location hole to cylinder base
Material 9 is positioned, and is rushed in advance using the first punch 6 in cylinder blank 9, corresponding with guide post 5 on the first punch 6 to be provided with
First guide hole 70, when rushing in advance, guide post 5 is inserted into the first guide hole 70,9 inside cavity of forming cylinder blank, and forming schematic diagram is shown in Fig. 7；
Impact extrusion is carried out using the second punch 10 in cylinder blank 9, the diameter of the second punch 10 is less than the straight of the first punch 6
Diameter, corresponding with guide post 5 on the second punch 10 to be provided with the second guide hole 71, during impact extrusion, guide post 5 is inserted into the second guide hole 71, forming
First ozzle 1, forming schematic diagram are shown in Fig. 8；
First punch 6 and the second punch 10 are needed from the 9 inside punching press of cylinder blank, for the ease of the first punch 6 and second
Punch 10 exerts a force, and the first punch 6 and the second punch 10 are put into cylinder blank 9 and are rushed respectively using special bearing 8
Pressure, the special bearing 8 include bottom end rail 802 and bearing column 801, bottom end rail 802 and bearing column 801 by such as bolt,
The removablies such as pin connect, and bottom end rail 802 is installed on movable crossrail of press and is moved up and down with it, the first punch 6 or the
Two punches 10 are installed on bottom end rail 802 and are moved up and down with it.Cylinder blank 9 is positioned in lower die 3 first during forging, it is fixed to make
Position hole passes through the guide post 5 of lower die 3, and the bottom end rail 802 that punch is then equipped with by the clamping of operation machine passes through 9 center of cylinder blank,
When forcer position alignment blank location hole, hydraulic press beam, which drives bearing column 801 to move down, makes it mutual with bottom end rail 802
Cooperation is combined as a closed framework device, and the special bearing 8 after combination is moved up and down with press crossbeam to be squeezed
The first ozzle 1 is shaped, wherein, the equipment such as hydraulic press, hydraulic press may be used in press.
7. turned blank end face gradient α, in order to which the first drain cap 11 is used to reduce material flowing resistance when shaping the second ozzle 2
Power, flowing of diametrically closing up convenient for material, wherein, the value range of α is 15 °~30 °, the second ozzle forming conveyor front barrel base
Material structure diagram is shown in Fig. 9.
There is gradient α one end to be placed in the first drain cap 11, and make using 12 jumping-up of upsetting plate with gradient α cylinder blank 9
One end jumping-up close up, reduce one end diameter of 9 gradient α of cylinder blank, forming schematic diagram is shown in Figure 10；
There is gradient α one end to be placed in the second drain cap 13 being adapted with the second ozzle 2 cylinder blank 9, utilize upsetting plate 12
The second ozzle of upsetting formation 2, forming schematic diagram are shown in Figure 11.To prevent, using after 2 upsetting formation of drain cap, there are step misruns for endoporus
The defects of, after using 13 the second ozzle of upsetting formation 2 of the second drain cap, the jumping-up cylinder to match is set inside cylinder blank 9
14 carry out inner barrel extruding, and forming schematic diagram is shown in Figure 12.After the forming of above step, it is finally completed profiling forging pump case
Forging.
Claims (7)
1. ozzle forging method, which is characterized in that including the first ozzle of forging (1), the first ozzle of forging (1) including walking as follows
Suddenly：
Location hole is processed on cylinder blank (9)；
Local heating is carried out to location hole；
Cylinder blank (9) is positioned in lower die (3), the guide post to match with location hole is provided in the jet-bedding (4) of lower die (3)
(5), guide post (5) positions cylinder blank (9) across location hole；
It is rushed in advance using the first punch (6) in cylinder blank (9), it is corresponding with guide post (5) on the first punch (6) to be provided with
First guide hole (70), when rushing in advance, guide post (5) is inserted into the first guide hole (70), the internal cavity of forming cylinder blank (9)；
Impact extrusion is carried out using the second punch (10) in cylinder blank (9), the diameter of the second punch (10) is less than the first punch (6)
Diameter, corresponding with guide post (5) on the second punch (10) to be provided with the second guide hole (71), during impact extrusion, guide post (5) is inserted into second
Guide hole (71), the first ozzle of forming (1).
2. ozzle forging method as described in claim 1, which is characterized in that using special bearing (8) respectively by first
Punch (6) and the second punch (10), which are put into cylinder blank (9), carries out punching press.
3. ozzle forging method as claimed in claim 2, which is characterized in that the special bearing (8) is including bottom end rail
(802) it is connected with bearing column (801), bottom end rail (802) with bearing column (801) by removably, bottom end rail (802) installation
In being moved up and down on movable crossrail of press with it, the first punch (6) or the second punch (10) are installed on bottom end rail (802) with it
It moves up and down.
4. ozzle forging method as described in claim 1, which is characterized in that including the second ozzle of forging (2), the second pipe of forging
Mouth (2) includes the following steps：
The inclined-plane that processing gradient is α on the outside of the end face of cylinder blank (9)；
There is gradient α one end local heating to cylinder blank (9)；
There is gradient α one end to be placed in the first drain cap (11) cylinder blank (9), and made using upsetting plate (12) jumping-up with gradient
One end jumping-up of α closes up；
There is gradient α one end to be placed in the second drain cap (13) being adapted with the second ozzle (2) cylinder blank (9), utilize upsetting plate
(12) the second ozzle of upsetting formation (2).
5. ozzle forging method as claimed in claim 4, which is characterized in that utilizing the second drain cap (13) upsetting formation second
After ozzle (2), the jumping-up cylinder (14) that setting matches inside cylinder blank (9) carries out inner barrel extruding.
6. ozzle forging method as claimed in claim 4, which is characterized in that the value range of α is 15 °~30 °.
7. nuclear power main pump pump case profiling forging technology, which is characterized in that including as described in any claim in claim 1-6
Ozzle forging method.
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| CN201711476079.5A CN108213295B (en) | 2017-12-29 | 2017-12-29 | Ozzle forging method and nuclear power main pump pump case profiling forging technology |
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| CN201711476079.5A CN108213295B (en) | 2017-12-29 | 2017-12-29 | Ozzle forging method and nuclear power main pump pump case profiling forging technology |
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| CN108213295B CN108213295B (en) | 2019-07-16 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110328267A (en) * | 2019-06-03 | 2019-10-15 | 武汉重工铸锻有限责任公司 | The method for forming super pipeline heavy wall ozzle |
| CN111014540A (en) * | 2020-01-02 | 2020-04-17 | 上海电气上重铸锻有限公司 | Third-generation nuclear power coolant pump shell profiling forging forming method |
| CN111702118A (en) * | 2020-06-18 | 2020-09-25 | 中国第一重型机械股份公司 | Method and die for forging main pump shell by using hollow steel ingot |
| CN112756537A (en) * | 2021-02-26 | 2021-05-07 | 辽宁北祥重工机械制造有限公司 | Near-net forming die and forming method for pump shell forging of nuclear power main pump |
| CN112846057A (en) * | 2021-02-20 | 2021-05-28 | 中国第一重型机械股份公司 | Integral profiling extrusion method for thin-wall pipeline with multiple nozzles |
| WO2023115752A1 (en) * | 2021-12-22 | 2023-06-29 | 二重（德阳）重型装备有限公司 | Die forging forming die and die forging forming method for large l-shaped hollow thin-walled pipe |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110328267A (en) * | 2019-06-03 | 2019-10-15 | 武汉重工铸锻有限责任公司 | The method for forming super pipeline heavy wall ozzle |
| CN110328267B (en) * | 2019-06-03 | 2020-12-29 | 武汉重工铸锻有限责任公司 | Method for forming thick-wall nozzle of super pipeline |
| CN111014540A (en) * | 2020-01-02 | 2020-04-17 | 上海电气上重铸锻有限公司 | Third-generation nuclear power coolant pump shell profiling forging forming method |
| CN111014540B (en) * | 2020-01-02 | 2021-03-02 | 上海电气上重铸锻有限公司 | Third-generation nuclear power coolant pump shell profiling forging forming method |
| CN111702118A (en) * | 2020-06-18 | 2020-09-25 | 中国第一重型机械股份公司 | Method and die for forging main pump shell by using hollow steel ingot |
| CN111702118B (en) * | 2020-06-18 | 2022-04-22 | 中国第一重型机械股份公司 | Method and die for forging main pump shell by using hollow steel ingot |
| CN112846057A (en) * | 2021-02-20 | 2021-05-28 | 中国第一重型机械股份公司 | Integral profiling extrusion method for thin-wall pipeline with multiple nozzles |
| CN112846057B (en) * | 2021-02-20 | 2022-06-21 | 中国第一重型机械股份公司 | Integral profiling extrusion method for thin-wall pipeline with multiple nozzles |
| CN112756537A (en) * | 2021-02-26 | 2021-05-07 | 辽宁北祥重工机械制造有限公司 | Near-net forming die and forming method for pump shell forging of nuclear power main pump |
| CN112756537B (en) * | 2021-02-26 | 2024-05-14 | 辽宁北祥重工机械制造有限公司 | Near-net forming die and forming method for nuclear power main pump shell forging |
| WO2023115752A1 (en) * | 2021-12-22 | 2023-06-29 | 二重（德阳）重型装备有限公司 | Die forging forming die and die forging forming method for large l-shaped hollow thin-walled pipe |
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